These Philips 23 watt CFL light bulbs (4-pack) are compact in stature, enabling use in smaller fixtures and occupying minimal space in larger fixtures. A soft white (2700K) light radiates from these long-lasting lamps, casting a pleasant glow across interior expanses both commercial and residential. Much more efficient than a 100 watt incandescent equivalent, each Mini Twister fluorescent bulb puts out a robust 1600 lumens at a cost of only $2.77 in electricity consumption per year, saving you $110 over its lifetime. These T2-shaped bulbs are designed to last for 12,000 hours of dependable use and have earned Energy Star accolades for top-notch efficiency. (E)* means this bulb meets federal minimum efficiency standards.